Medical

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Immune System, part 1: Crash Course A&P #45 Our final episodes of Anatomy & Physiology explore the way your body keeps all that complex, intricate stuff alive and healthy -- your immune system. The immune system’s responses begin with physical barriers like skin and mucous membranes, and when they’re not enough, there are phagocytes -- the neutrophils and macrophages. It also features the awesomely named natural killer cells and the inflammatory response, and we'll explain how all of these elements work together to save the day if you happen to slip on a banana peel. video

Immunology Type of Immunology are: Innate Immunity                Acquired   Immunity Structure& Mechanism of Actions -Have external barriers -1 st line defense -Very quick -Exist from birth -Have external barriers -2 st line defense -Delay -Activated after the exposure to micro-organisms Specificity -No specificity -Only act against micro organism -Doesn’t act against our own body -Less potent -More specific -Act against micro- organism and other foreign subjects -Sometimes act against our own body -More potent Receptors Limited diversity More diversity Cells Phagocytes and NK cells Lymphocytes Molecules Natural antibodies presenting epithelial layers Antibodies are present Memory No yes Exposure Response will not change due to repeated exposure Increased aff...